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File: Library/vendor/twig/twig/doc/tests/defined.rst

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File: Library/vendor/twig/twig/doc/tests/defined.rst
Role: Auxiliary data
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Description: Auxiliary data
Class: Lego PHP
Blog and shopping cart system
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Date: 7 years ago
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``defined`` =========== ``defined`` checks if a variable is defined in the current context. This is very useful if you use the ``strict_variables`` option: .. code-block:: jinja {# defined works with variable names #} {% if foo is defined %} ... {% endif %} {# and attributes on variables names #} {% if foo.bar is defined %} ... {% endif %} {% if foo['bar'] is defined %} ... {% endif %} When using the ``defined`` test on an expression that uses variables in some method calls, be sure that they are all defined first: .. code-block:: jinja {% if var is defined and foo.method(var) is defined %} ... {% endif %}